Comparison of phosphorus fraction distribution and influencing factors of suspended and surface sediments in the Tiaoxi watershed, China

Suspended and surface sediments from the Tiaoxi watershed, fed by the Xitiaoxi and Dongtiaoxi rivers, were analyzed for total phosphorus (TP) and the inorganic P fractions of loosely adsorbed P that were extractable with NH Cl (NH Cl-P), reductant P (BD-P), metal oxide-bound P extractable with NaOH...

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Veröffentlicht in:Water science and technology 2017-05, Vol.75 (9-10), p.2108-2118
Hauptverfasser: Ye, Hongmeng, Yuan, Xuyin, Han, Lei, Yin, Heng, Jin, Jing
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Yuan, Xuyin
Han, Lei
Yin, Heng
Jin, Jing
description Suspended and surface sediments from the Tiaoxi watershed, fed by the Xitiaoxi and Dongtiaoxi rivers, were analyzed for total phosphorus (TP) and the inorganic P fractions of loosely adsorbed P that were extractable with NH Cl (NH Cl-P), reductant P (BD-P), metal oxide-bound P extractable with NaOH (NaOH-P), and calcium-bound, HCl-extractable P (HCl-P), while other physicochemical compositions were also determined. The spatial variations of P fractions in these sediments were investigated, and the major factors influencing the various fractions were explored by multivariate statistics. Compared to surface sediments, suspended sediments contained considerably higher concentrations of total nitrogen, TP, organic matter, Al, Fe, Mn and biologically available P (BAP, given as NH Cl-P, BD-P and NaOH-P combined) and lower concentrations of Si, Ca and HCl-P in the studied catchments. Dongtiaoxi sediments had higher TP, inorganic phosphorus and HCl-P concentrations and a lower BAP content compared with Xitiaoxi sediments, trends that were associated with local geological backgrounds, landscapes and anthropogenic characteristics. The results of principal component analysis showed different effects of sediment properties on P fraction distributions for Xitiaoxi and Dongtiaoxi sediments. The sediment components and structure exert a strong influence on BAP in Xitiaoxi sediments, in contrast to Dongtiaoxi sediments, where P fractions are mainly affected by urbanization and other anthropogenic activities such as shipping.
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The spatial variations of P fractions in these sediments were investigated, and the major factors influencing the various fractions were explored by multivariate statistics. Compared to surface sediments, suspended sediments contained considerably higher concentrations of total nitrogen, TP, organic matter, Al, Fe, Mn and biologically available P (BAP, given as NH Cl-P, BD-P and NaOH-P combined) and lower concentrations of Si, Ca and HCl-P in the studied catchments. Dongtiaoxi sediments had higher TP, inorganic phosphorus and HCl-P concentrations and a lower BAP content compared with Xitiaoxi sediments, trends that were associated with local geological backgrounds, landscapes and anthropogenic characteristics. The results of principal component analysis showed different effects of sediment properties on P fraction distributions for Xitiaoxi and Dongtiaoxi sediments. 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subjects Algae
Aluminum
Ammonium chloride
Anthropogenic factors
Aquatic ecosystems
Bioavailability
Calcium
Catchment area
Catchments
China
Earth science
Environmental conditions
Environmental Monitoring - methods
Environmental science
Eutrophication
Geologic Sediments - chemistry
Geology
Geomorphology
Heavy metals
Human influences
Iron
Lakes
Land use
Landscape
Manganese
Multivariate analysis
Organic matter
Particle size
Phosphorus
Phosphorus - chemistry
Principal components analysis
Rivers
Rivers - chemistry
Sediment
Sediments
Shipping
Sodium hydroxide
Soil properties
Spatial distribution
Spatial variations
Statistical analysis
Statistical methods
Suspended sediments
Urbanization
Water Movements
Water Pollutants, Chemical - chemistry
Water quality
Watersheds
title Comparison of phosphorus fraction distribution and influencing factors of suspended and surface sediments in the Tiaoxi watershed, China
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